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you cant change it. its in the ECU and in the dash, i feel your pain, my 48re lives in tow/ haul. your 03 is a 47re i believe
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07' Silver 2500 5.9 4x4 LWB
Goerend 48re-csp5/EFI- T&C Mild Cp3-F1 Apex 7.5 -S369sxe Amsoil
Coolant Bypass -Airdog-D&J- Hamilton 188/220 -AFE-ARP Opti-Lube
H-Town Off-Road
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